CN215261971U - Guided wave radar level gauge for PEO storage tank - Google Patents
Guided wave radar level gauge for PEO storage tank Download PDFInfo
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- CN215261971U CN215261971U CN202121166645.4U CN202121166645U CN215261971U CN 215261971 U CN215261971 U CN 215261971U CN 202121166645 U CN202121166645 U CN 202121166645U CN 215261971 U CN215261971 U CN 215261971U
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Abstract
The utility model relates to a guided wave radar charge level indicator for a PEO storage tank, which comprises a radar component, a fixed seat, a dust cover, a scraping device, a blowing device and a temperature sensor, wherein the dust cover is fixedly connected with the top of the fixed seat, the radar component comprises a radar sensor and a guided wave rod, the radar sensor is positioned in the dust cover, the guided wave rod comprises a protective electrode, a measuring electrode, a stainless steel counterweight and a connecting wire, the blowing device comprises an air inlet pipe, a pneumatic ball valve, a ball valve controller and an air outlet nozzle group, the scraping device comprises a scraping cylinder, a brush group and a brush seat, the scraping device and the blowing device can clean the working environment of the radar sensor at any time through control, and can cool the internal circuit of the radar sensor to ensure the long-term stable work of the radar charge level indicator, the utility model discloses a radar charge level indicator designed according to the time domain reflection measurement principle, the device has the advantages of accurate material level measurement, low energy consumption and no influence of fog, foam, medium density and the like.
Description
Technical Field
The utility model relates to a chemical production measuring device field, especially a guided wave radar charge level indicator for PEO storage tank.
Background
Polyethylene oxide (PEO) and polyethylene glycol (PEG) are high-molecular polymers generated by ring opening polymerization of polyethylene oxide under the action of a catalyst, and the difference is that the relative molecular mass of PEG is 200-20000, and the relative molecular mass of PEO is more than 2 ten thousand, so that PEO has the properties of high viscosity, strong crystallinity, thermoplasticity and the like, has high requirement on a level gauge, and is not suitable for level gauges which take liquid fluidity as the principle, such as a differential pressure ultrasonic level gauge, a magnetic flip plate level gauge and the like.
There are many kinds at the level instrument that is applied to the chemical industry field at present, and wherein guided wave radar level gauge is used for measuring most chemical industry liquid material and the higher solid powder degree of accuracy of crystallization is higher, and the guided wave radar is the same with conventional radar, adopts transmission time to measure the medium material level, and the time that the signal was passed back from medium surface or surface of water reflection is the same. The difference is signal amplitude's difference, and the influence of medium need be considered to ordinary radar, and the real material level signal is more difficult to discern, and the guided wave radar only need measure the transmission time of electromagnetic wave can, need not the processing of signal and differentiates. However, the guided wave radar level gauge applied to the chemical field at present has the problems of higher energy consumption cost, inconvenient installation and maintenance and influence on measurement precision by the form change of a medium.
Therefore, a special low-energy-consumption guided wave radar level gauge special for a PEO storage tank is needed, the measurement accuracy is high, and the guided wave radar level gauge is not influenced by fog, foam and medium density.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a material level measurement is accurate, does not receive guided wave radar charge level indicator for PEO storage tank of fog, foam, medium density influence.
The adopted technical scheme is as follows:
a guided wave radar charge level indicator for a PEO storage tank structurally comprises a radar component, a fixing base, a dust cover, a scraping device, a blowing device and a temperature sensor, wherein the dust cover is fixedly connected to the top of the fixing base, the radar component comprises a radar sensor and a guided wave rod, the radar sensor is located in the dust cover, the bottom of the radar sensor is fixedly connected with the fixing base, the guided wave rod comprises a protective electrode, a measuring electrode, a stainless steel counterweight and a connecting wire, the protective electrode, the measuring electrode, the connecting wire and the stainless steel counterweight are sequentially connected from top to bottom, the top end of the protective electrode penetrates through the fixing base and is connected with the radar sensor, the blowing device comprises an air inlet pipe, a pneumatic ball valve, a ball valve controller and an air outlet nozzle group, the ball valve controller is connected with the pneumatic ball valve and controls the pneumatic ball valve to be opened and closed, the pneumatic ball valve is installed on the air inlet pipe, the air inlet pipe is fixedly connected with the fixing base and is conducted with the air outlet nozzle group, go out the air cock group and include the air cock of certain quantity, the air cock is fixed in the top of fixing base and the bottom border equipartition of duplex winding radar sensor, scrape sweep the device including scraping and sweep cylinder, brush group, brush seat, scrape the vertical fixed connection of scavenging cylinder in the dust cover, its drive end and brush seat fixed connection, brush seat is the circle structure to overlap in radar sensor's periphery, brush group is including the brush of certain quantity and border fixed connection on brush seat, the soft hair part of brush and radar sensor's outer wall butt, temperature sensor fixed connection is in outside one side of dust cover.
Preferably, the radar sensor, the temperature sensor, the ball valve controller and the sweeping cylinder are connected with the DCS controller, so that the material position and the working temperature information are displayed in real time, and the sweeping cylinder and the ball valve controller are controlled to act.
The utility model has the advantages that:
1. the utility model discloses radar charge level indicator according to time domain reflectometry principle design has the charge level and measures the accuracy, does not receive fog, foam, medium density influence and the low advantage of energy consumption.
2. The utility model discloses in through being equipped with and scrape the device and sweep the device, can clear up radar sensor's operational environment at any time through control, and can cool down radar sensor's internal circuit, guarantee that radar charge level indicator can long-term stable work
3. The utility model provides an action part and measurement element are controlled by the DCS controller is automatic, and the operation is stable, meets the trouble and can in time report to the police, handles.
4. The utility model discloses a bottommost of guided wave pole is the stainless steel counter weight, has certain inhibition ability to steam and foam to do not receive the density of material and the influence of the loose degree of solid material, can improve the measuring precision.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is an enlarged schematic view at A;
FIG. 3 is an enlarged schematic view at B;
FIG. 4 is a cross-sectional view of C-C;
the reference symbols shown in the figures are: 1-a fixed seat, 2-a dust cover, 3-a temperature sensor, 4-a radar sensor, 5-a protective electrode, 6-a measuring electrode, 7-a connecting wire, 8-a stainless steel counterweight, 9-an air inlet pipe, 10-a starting ball valve, 11-a ball valve controller, 12-an air outlet nozzle, 13-a sweeping cylinder, 14-a brush seat, 15-a brush and 16-a PEO storage tank.
Detailed Description
The following describes the present design in detail with reference to the accompanying drawings.
As shown in figures 1-4, the guided wave radar level gauge for the PEO storage tank structurally comprises a radar component, a fixed seat 1, a dust cover 2, a scraping device, a purging device and a temperature sensor 3, wherein the dust cover 2 is fixedly connected to the top of the fixed seat 1, the radar component comprises a radar sensor 4 and a guided wave rod, the radar sensor 4 is positioned in the dust cover 2, the bottom of the radar sensor is fixedly connected with the fixed seat 1, the radar sensor 4 outputs signals in an electromagnetic wave conduction mode, the energy of the guided wave radar signals is small, the attenuation of the signals is kept to the minimum limit, in addition, as a power supply loop is not provided with independent alternating current power supply, the energy consumption of the guided wave radar is small, a system in the radar sensor 4 is measured by using an ultrahigh frequency and high-precision FMCW radar and some auxiliary equipment, the FMCW radar beam angle is 3 degrees, the energy is concentrated, and the guided wave radar level gauge has stronger anti-interference capability, the measuring precision and the reliability are greatly improved, the radar sensor 4 is a contact cable type radar sensor, the maximum measuring range is 30 meters, the guided wave rod comprises a protective electrode 5, a measuring electrode 6, a stainless steel counterweight 8 and a connecting wire 7, the protective electrode 5, the measuring electrode 6, the connecting wire 7 and the stainless steel counterweight 5 are sequentially connected from top to bottom, the top end of the protective electrode 5 penetrates through a fixed seat and is connected with the radar sensor 4, the purging device comprises an air inlet pipe 9, a pneumatic ball valve 10, a ball valve controller 11 and an air outlet nozzle group, the ball valve controller 11 is connected with the pneumatic ball valve 10 and controls the pneumatic ball valve 10 to be opened and closed, the ball valve controller 11 is of a pneumatic type, has a valve positioning function, overcomes the friction force of the valve rod and the unbalanced force caused by the change of the medium pressure, so that the valve can quickly follow the control signal output by the regulator to realize the quick positioning of the regulating valve, the quality of the adjustment is improved. Pneumatic ball valve 10 is installed in intake pipe 9, intake pipe 9 switches on with 1 fixed connection of fixing base and with play glib group, play glib group includes the play glib 12 of a certain amount, play glib 12 is fixed in the top of fixing base and winds radar sensor 4's bottom border equipartition, scrape the device including scraping and sweep cylinder 13, brush group, brush seat 14, scrape and sweep the vertical fixed connection of cylinder 13 in dust cover 2, its drive end and brush seat 14 fixed connection, brush seat 14 is the circle structure, and overlap in radar sensor 4's periphery, brush group includes brush 15 and border fixed connection of a certain amount on brush seat 14, the fur portion of brush 15 and radar sensor 4's outer wall butt, 3 fixed connection of temperature sensor is in outside one side of dust cover 2.
Wherein, radar sensor 4, temperature sensor 3, ball valve controller 11, sweep cylinder 13 and all link to each other with the DCS controller, show material position, operating temperature information in real time and control the action of sweeping cylinder 13 and ball valve controller 11.
Examples
The work process of the guided wave radar level gauge for the PEO storage tank is the process of electromagnetic wave signal conduction, pulse signals output by a circuit board in the radar sensor 4 can be transmitted through a coaxial cable and a measuring electrode 5 on a coaxial guided wave rod, the connection part of the coaxial cable and the guided wave rod can be firstly broken, then a part of signals can generate a top echo signal, but still a part of signals can continue to be transmitted along the guided wave rod. When the signal contacts the surface of the measured liquid, the impedance characteristic of the signal changes, a part of the signal is reflected, and a real level echo signal is generated again. Another part of the signal will still continue to propagate downward and will eventually be lost in the constant transmission. The level meter can judge the time difference between the echo of the discharge level and the echo of the top, and the height of the level can be obtained by calculation according to the time difference.
The utility model discloses when using, there are two kinds of situations, as shown in FIG. 1, one kind is when PEO storage tank 16 is empty, does not have the material level just can not take place the material level echo signal, but still has top echo signal, can open circuit and produce bottom echo signal in the bottom of guided wave pole moreover. In another case, when a medium having a dielectric constant different between the upper and lower parts exists in the tank, the radar sensor 4 can detect the level of the material in the tank by receiving the time difference of the electromagnetic waves when a medium exists; if PEO in the tank has different storage time, the difference of dielectric constants of the upper part and the lower part can occur, more than one medium can be used, then the interface of the two media can be judged according to the difference of echoes, and then the different heights of the two media can be obtained, when the system is applied, the temperature sensor 3 measures that the temperature exceeds the operating temperature of the radar sensor 4, the radar sensor 4 is cleaned through a program preset by a DCS controller, at the moment, the ball valve controller 11 controls the pneumatic ball valve 10 to be opened, nitrogen is introduced into the air inlet pipe 9 and enters through the fixed seat 1 and is sprayed out from the air outlet nozzle 12 to remove dust and cool the radar sensor 4, the radar sensor 4 can be ensured to stably operate, if dust is firmly attached, the scraping cylinder 13 is controlled to operate, the driving end drives the brush seat 14 to move up and down, so that the brush 15 carries out dust cleaning treatment on the outer wall of the radar sensor 4, the operating environment of the radar sensor 4 is maintained. The utility model discloses the pulse signal of radar is through the guided wave pole propagation, and the performance can not be influenced in the condensation of air, gaseous state on the guided wave pole, consequently can measure the low dielectric constant medium for a long time.
Claims (2)
1. A guided wave radar charge level indicator for a PEO storage tank is characterized by structurally comprising a radar component, a fixed seat, a dust cover, a scraping device, a blowing device and a temperature sensor, wherein the dust cover is fixedly connected to the top of the fixed seat, the radar component comprises a radar sensor and a guided wave rod, the radar sensor is positioned in the dust cover, the bottom of the radar sensor is fixedly connected with the fixed seat, the guided wave rod comprises a protective electrode, a measuring electrode, a stainless steel counterweight and a connecting wire, the protective electrode, the measuring electrode, the connecting wire and the stainless steel counterweight are sequentially connected from top to bottom, the top end of the protective electrode penetrates through the fixed seat and is connected with the radar sensor, the blowing device comprises an air inlet pipe, a pneumatic ball valve, a ball valve controller and an air outlet nozzle group, the ball valve controller is connected with the pneumatic ball valve and controls the pneumatic ball valve to be opened and closed, and the pneumatic ball valve is installed on the air inlet pipe, the intake pipe switches on with fixing base fixed connection and with air outlet nozzle group, air outlet nozzle group includes the air outlet nozzle of a certain amount, air outlet nozzle is fixed in the top of fixing base and winds round the bottom border equipartition of radar sensor, scrape sweep the device including scraping and sweep cylinder, brush group, brush seat, scrape the vertical fixed connection of scavenging cylinder in the dust cover, its drive end and brush seat fixed connection, brush seat is the circle structure to overlap in radar sensor's periphery, brush group is including the brush of a certain amount and border fixed connection on brush seat, the soft hair part of brush and radar sensor's outer wall butt, temperature sensor fixed connection is in outside one side of dust cover.
2. The guided wave radar level gauge for the PEO storage tank, according to claim 1, is characterized in that the radar sensor, the temperature sensor, the ball valve controller and the sweeping cylinder are connected with a DCS controller, so that the material position and the working temperature information are displayed in real time, and the actions of the sweeping cylinder and the ball valve controller are controlled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121166645.4U CN215261971U (en) | 2021-05-28 | 2021-05-28 | Guided wave radar level gauge for PEO storage tank |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121166645.4U CN215261971U (en) | 2021-05-28 | 2021-05-28 | Guided wave radar level gauge for PEO storage tank |
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| CN215261971U true CN215261971U (en) | 2021-12-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117949063A (en) * | 2024-03-27 | 2024-04-30 | 矿冶科技集团有限公司 | Flotation liquid level detection device and flotation machine |
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2021
- 2021-05-28 CN CN202121166645.4U patent/CN215261971U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117949063A (en) * | 2024-03-27 | 2024-04-30 | 矿冶科技集团有限公司 | Flotation liquid level detection device and flotation machine |
| CN117949063B (en) * | 2024-03-27 | 2024-06-28 | 矿冶科技集团有限公司 | Flotation liquid level detection device and flotation machine |
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